Add local variable declaration token position to service protocol

runtime/vm/object.cc

Index: runtime/vm/object.cc
diff --git a/runtime/vm/object.cc b/runtime/vm/object.cc
index c9d92c23b8bc7a29475194c4bf5cc9722de0694b..31b1165a060e39fa1742ee23416964b189a74dfc 100644
--- a/runtime/vm/object.cc
+++ b/runtime/vm/object.cc
@@ -14801,6 +14801,21 @@ void ContextScope::SetTokenIndexAt(intptr_t scope_index,
 }
 
 
+TokenPosition ContextScope::DeclarationTokenIndexAt(
+    intptr_t scope_index) const {
+  return TokenPosition(
+      Smi::Value(VariableDescAddr(scope_index)->declaration_token_pos));
+}
+
+
+void ContextScope::SetDeclarationTokenIndexAt(
+    intptr_t scope_index,
+    TokenPosition declaration_token_pos) const {
+  StoreSmi(&VariableDescAddr(scope_index)->declaration_token_pos,
+           Smi::New(declaration_token_pos.value()));
+}
+
+
 RawString* ContextScope::NameAt(intptr_t scope_index) const {
   return VariableDescAddr(scope_index)->name;
 }